/Engine/Source/Editor/UnrealEd/Classes/CookOnTheSide/CookOnTheFlyServer.h
Clear platforms' explored flags for all PackageDatas and optionally clear the cookresult flags.
void ResetCook ( TConstArrayView< TPair< const [ITargetPlatform](API\Developer\TargetPlatform\Interfaces\ITargetPlatform) *, bool >> TargetPlatforms )